It is all based on labor costs in your area.
Rebuilt engines have two categories
Short Block, it will have cleaned block, new cam, crank and rod bearings, new rings and maybe new pistons or at least reconditioned pistons, new timing chain and gears, maybe new oil pump, or no oil pump.
But no heads
Long Block, will have the above and reconditioned heads torque down to spec, and for sure an oil pump
No valve covers, intake, or oil pan
1993 Ranger will have a 4.0l OHV engine, they were/are very reliable engines
Best replacement will be a 1990-1994 4.0l OHV
In 1995 front of crank changed a bit, and in 1997 rear of crank changed to 8 bolts from 6 so won't fit your current flywheel or flexplate
One flaw they all had was a weak spot in the head casting, there were no "heavy duty" heads made, even though they sell them, lol.
The weak spot would cause the head to crack if engine was overheated, yes many heads on many engines would crack on overheating, but 4.0l OHV would crack pretty much every time, so no "do overs", if you overheat it you will be buying at least one head if not two.
Timing chain lasted forever on these, 4.0l SOHC engine(1997-2005) had the timing chain issue.
Reconditioned 4.0l OHV long block goes for about $1,800, plus shipping
Short Block $750, plus shipping
Rebuilt heads w/valves, $350 set, plus shipping
Head gasket set with bolts, $90, includes intake and exhaust gaskets
Master rebuild kit for the 4.0l OHV costs about $600, includes all bearings, new pistons, timing chain and oil pump.
So you could do it yourself for under $1,000
Anyway those are the prices.
You need to call a few local Machine shops and ask them "how much?"
1993 Ford 4.0l OHV engine rebuild
Also if you can't pull out and reinstall the engine yourself, ask the machine shop if they recommend any one, most repair shops do not rebuild engines, they send them out to machine shops, so the machine shops will know the local repair shops
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